サービスに音声認識を実装しようとするために、Android 4.1 および 4.2 の投稿で Android Speech Recognition をサービスとして参照してきました。
私はそれを正しく理解したと思います。デバイスで実行すると、 onReadyForSpeech() 関数内で宣言した「Ready for Speech」トースト メッセージが表示されます。
上記の投稿の回答者であるHoan Nguyen氏によると、 onReadyForSpeech() 関数が呼び出されるとすぐに話し始めることができます。
私の問題は、私たちが話しているスピーチを取得してテキストに変換する方法と、それを行う場所がわからないことです。
誰もそれを行う方法を知っていますか? 非常に下手な質問であることは承知していますが、音声認識を扱うのは初めてです。だから我慢してください。
これに関するヘルプは大歓迎です。前もって感謝します ：）
public class MyService extends Service
{
protected AudioManager mAudioManager;
protected SpeechRecognizer mSpeechRecognizer;
protected Intent mSpeechRecognizerIntent;
protected final Messenger mServerMessenger = new Messenger(new IncomingHandler(this));
protected boolean mIsListening;
protected volatile boolean mIsCountDownOn;
static final int MSG_RECOGNIZER_START_LISTENING = 1;
static final int MSG_RECOGNIZER_CANCEL = 2;
@Override
public void onCreate()
{
super.onCreate();
mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
mSpeechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
mSpeechRecognizer.setRecognitionListener(new SpeechRecognitionListener());
mSpeechRecognizerIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE,
this.getPackageName());
mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
//Toast.makeText(this, "onCreate", Toast.LENGTH_SHORT).show();
Log.d("onCreate","Entered");
}
protected static class IncomingHandler extends Handler
{
private WeakReference<MyService> mtarget;
IncomingHandler(MyService target)
{
mtarget = new WeakReference<MyService>(target);
Log.d("IncomingHandler","Entered");
}
@Override
public void handleMessage(Message msg)
{
Log.d("handleMessage","Entered");
final MyService target = mtarget.get();
switch (msg.what)
{
case MSG_RECOGNIZER_START_LISTENING:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
{
// turn off beep sound
target.mAudioManager.setStreamMute(AudioManager.STREAM_SYSTEM, true);
}
if (!target.mIsListening)
{
target.mSpeechRecognizer.startListening(target.mSpeechRecognizerIntent);
target.mIsListening = true;
Log.d("TAG", "message start listening");
//$NON-NLS-1$
}
break;
case MSG_RECOGNIZER_CANCEL:
target.mSpeechRecognizer.cancel();
target.mIsListening = false;
Log.d("TAG", "message canceled recognizer"); //$NON-NLS-1$
break;
}
}
}
// Count down timer for Jelly Bean work around
protected CountDownTimer mNoSpeechCountDown = new CountDownTimer(5000, 5000)
{
@Override
public void onTick(long millisUntilFinished)
{
// TODO Auto-generated method stub
Log.d("onTick","Entered");
}
@Override
public void onFinish()
{
Log.d("onFinish","Entered");
mIsCountDownOn = false;
Message message = Message.obtain(null, MSG_RECOGNIZER_CANCEL);
try
{
mServerMessenger.send(message);
message = Message.obtain(null, MSG_RECOGNIZER_START_LISTENING);
mServerMessenger.send(message);
}
catch (RemoteException e)
{
}
}
};
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// TODO Auto-generated method stub
//mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
try
{
Message msg = new Message();
msg.what = MSG_RECOGNIZER_START_LISTENING;
mServerMessenger.send(msg);
}
catch (RemoteException e)
{
Log.d("msg",""+e);
}
return START_NOT_STICKY;
//return super.onStartCommand(intent, flags, startId);
}
@Override
public void onDestroy()
{
super.onDestroy();
if (mIsCountDownOn)
{
mNoSpeechCountDown.cancel();
}
if (mSpeechRecognizer != null)
{
mSpeechRecognizer.destroy();
}
Log.d("onDestroy","Entered");
}
protected class SpeechRecognitionListener implements RecognitionListener
{
private static final String TAG = "Sppech---->";
@Override
public void onBeginningOfSpeech()
{
// speech input will be processed, so there is no need for count down anymore
if (mIsCountDownOn)
{
mIsCountDownOn = false;
mNoSpeechCountDown.cancel();
}
//Log.d(TAG, "onBeginingOfSpeech"); //$NON-NLS-1$
Log.d("onBeginningOfSpeech","Entered");
}
@Override
public void onBufferReceived(byte[] buffer)
{
String sTest = "";
Log.d("onBufferReceived","Entered");
}
@Override
public void onEndOfSpeech()
{
//Log.d(TAG, "onEndOfSpeech"); //$NON-NLS-1$
Log.d("onEndOfSpeech","Entered");
}
@Override
public void onError(int error)
{
if (mIsCountDownOn)
{
mIsCountDownOn = false;
mNoSpeechCountDown.cancel();
}
mIsListening = false;
Message message = Message.obtain(null, MSG_RECOGNIZER_START_LISTENING);
try
{
mServerMessenger.send(message);
}
catch (RemoteException e)
{
}
//Log.d(TAG, "error = " + error); //$NON-NLS-1$
Log.d("onError","Entered");
}
@Override
public void onEvent(int eventType, Bundle params)
{
}
@Override
public void onPartialResults(Bundle partialResults)
{
}
@Override
public void onReadyForSpeech(Bundle params)
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
{
mIsCountDownOn = true;
mNoSpeechCountDown.start();
mAudioManager.setStreamMute(AudioManager.STREAM_SYSTEM, false);
}
//Log.d("TAG", "onReadyForSpeech");
Toast.makeText(getApplicationContext(), "Ready for Speech", Toast.LENGTH_SHORT).show();
Log.d("onReadyForSpeech","Entered");//$NON-NLS-1$
}
@Override
public void onResults(Bundle results)
{
//Log.d(TAG, "onResults"); //$NON-NLS-1$
}
@Override
public void onRmsChanged(float rmsdB)
{
}
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
}